/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


// This is the annotated source code for
// [VisualSearch.js](http://documentcloud.github.com/visualsearch/),
// a rich search box for real data.
// 
// The annotated source HTML is generated by
// [Docco](http://jashkenas.github.com/docco/).

/** @license VisualSearch.js 0.4.0
 *  (c) 2011 Samuel Clay, @samuelclay, DocumentCloud Inc.
 *  VisualSearch.js may be freely distributed under the MIT license.
 *  For all details and documentation:
 *  http://documentcloud.github.com/visualsearch
 */

(function() {

  var $ = jQuery; // Handle namespaced jQuery

  // Setting up VisualSearch globals. These will eventually be made instance-based.
  if (!window.VS) window.VS = {};
  if (!VS.app)    VS.app    = {};
  if (!VS.ui)     VS.ui     = {};
  if (!VS.model)  VS.model  = {};
  if (!VS.utils)  VS.utils  = {};

  // Sets the version for VisualSearch to be used programatically elsewhere.
  VS.VERSION = '0.5.0';

  VS.VisualSearch = function(options) {
    var defaults = {
      container   : '',
      query       : '',
      autosearch  : true,
      unquotable  : [],
      remainder   : 'text',
      showFacets  : true,
      readOnly    : false,
      callbacks   : {
        search          : $.noop,
        focus           : $.noop,
        blur            : $.noop,
        facetMatches    : $.noop,
        valueMatches    : $.noop,
        clearSearch     : $.noop,
        removedFacet    : $.noop
      }
    };
    this.options           = _.extend({}, defaults, options);
    this.options.callbacks = _.extend({}, defaults.callbacks, options.callbacks);
    
    VS.app.hotkeys.initialize();
    this.searchQuery   = new VS.model.SearchQuery();
    this.searchBox     = new VS.ui.SearchBox({
        app: this, 
        showFacets: this.options.showFacets
    });

    if (options.container) {
      var searchBox = this.searchBox.render().el;
      $(this.options.container).html(searchBox);
    }
    this.searchBox.value(this.options.query || '');

    // Disable page caching for browsers that incorrectly cache the visual search inputs.
    // This forces the browser to re-render the page when it is retrieved in its history.
    $(window).bind('unload', function(e) {});

    // Gives the user back a reference to the `searchBox` so they
    // can use public methods.
    return this;
  };

  // Entry-point used to tie all parts of VisualSearch together. It will either attach
  // itself to `options.container`, or pass back the `searchBox` so it can be rendered
  // at will.
  VS.init = function(options) {
    return new VS.VisualSearch(options);
  };

})();

(function() {

var $ = jQuery; // Handle namespaced jQuery

// The search box is responsible for managing the many facet views and input views.
VS.ui.SearchBox = Backbone.View.extend({

  id  : 'search',

  events : {
    'click .VS-cancel-search-box' : 'clearSearch',
    'mousedown .VS-search-box'    : 'maybeFocusSearch',
    'dblclick .VS-search-box'     : 'highlightSearch',
    'click .VS-search-box'        : 'maybeTripleClick'
  },

  // Creating a new SearchBox registers handlers for re-rendering facets when necessary,
  // as well as handling typing when a facet is selected.
  initialize : function(options) {
    this.options = _.extend({}, this.options, options);

    this.app = this.options.app;
    this.flags = {
      allSelected : false
    };
    this.facetViews = [];
    this.inputViews = [];
    _.bindAll(this, 'renderFacets', '_maybeDisableFacets', 'disableFacets',
              'deselectAllFacets', 'addedFacet', 'removedFacet', 'changedFacet');
    this.app.searchQuery
            .bind('reset', this.renderFacets)
            .bind('add', this.addedFacet)
            .bind('remove', this.removedFacet)
            .bind('change', this.changedFacet);
    $(document).bind('keydown', this._maybeDisableFacets);
  },

  // Renders the search box, but requires placement on the page through `this.el`.
  render : function() {
    $(this.el).append(JST['search_box']({
      readOnly: this.app.options.readOnly
    }));
    $(document.body).setMode('no', 'search');

    return this;
  },

  // # Querying Facets #

  // Either gets a serialized query string or sets the faceted query from a query string.
  value : function(query) {
    if (query == null) return this.serialize();
    return this.setQuery(query);
  },

  // Uses the VS.app.searchQuery collection to serialize the current query from the various
  // facets that are in the search box.
  serialize : function() {
    var query           = [];
    var inputViewsCount = this.inputViews.length;

    this.app.searchQuery.each(_.bind(function(facet, i) {
      query.push(this.inputViews[i].value());
      query.push(facet.serialize());
    }, this));

    if (inputViewsCount) {
      query.push(this.inputViews[inputViewsCount-1].value());
    }

    return _.compact(query).join(' ');
  },

  // Returns any facet views that are currently selected. Useful for changing the value
  // callbacks based on what else is in the search box and which facet is being edited.
  selected: function() {
    return _.select(this.facetViews, function(view) {
      return view.modes.editing == 'is' || view.modes.selected == 'is';
    });
  },

  // Similar to `this.selected`, returns any facet models that are currently selected.
  selectedModels: function() {
    return _.pluck(this.selected(), 'model');
  },

  // Takes a query string and uses the SearchParser to parse and render it. Note that
  // `VS.app.SearchParser` refreshes the `VS.app.searchQuery` collection, which is bound
  // here to call `this.renderFacets`.
  setQuery : function(query) {
    this.currentQuery = query;
    VS.app.SearchParser.parse(this.app, query);
  },

  // Returns the position of a facet/input view. Useful when moving between facets.
  viewPosition : function(view) {
    var views    = view.type == 'facet' ? this.facetViews : this.inputViews;
    var position = _.indexOf(views, view);
    if (position == -1) position = 0;
    return position;
  },

  // Used to launch a search. Hitting enter or clicking the search button.
  searchEvent : function(e) {
    var query = this.value();
    this.focusSearch(e);
    this.value(query);
    this.app.options.callbacks.search(query, this.app.searchQuery);
  },

  // # Rendering Facets #

  // Add a new facet. Facet will be focused and ready to accept a value. Can also
  // specify position, in the case of adding facets from an inbetween input.
  addFacet : function(category, initialQuery, position) {
    category     = VS.utils.inflector.trim(category);
    initialQuery = VS.utils.inflector.trim(initialQuery || '');
    if (!category) return;

    var model = new VS.model.SearchFacet({
      category : category,
      value    : initialQuery || '',
      app      : this.app
    });
    this.app.searchQuery.add(model, {at: position});
  },

  // Renders a newly added facet, and selects it.
  addedFacet : function (model) {
    this.renderFacets();
    var facetView = _.detect(this.facetViews, function(view) {
      if (view.model == model) return true;
    });

    _.defer(function() {
      facetView.enableEdit();
    });
  },

  // Changing a facet programmatically re-renders it.
  changedFacet: function () {
    this.renderFacets();
  },

  // When removing a facet, potentially do something. For now, the adjacent
  // remaining facet is selected, but this is handled by the facet's view,
  // since its position is unknown by the time the collection triggers this
  // remove callback.
  removedFacet : function (facet, query, options) {
    this.app.options.callbacks.removedFacet(facet, query, options);
  },

  // Renders each facet as a searchFacet view.
  renderFacets : function() {
    this.facetViews = [];
    this.inputViews = [];

    this.$('.VS-search-inner').empty();

    this.app.searchQuery.each(_.bind(this.renderFacet, this));

    // Add on an n+1 empty search input on the very end.
    this.renderSearchInput();
    this.renderPlaceholder();
  },

  // Render a single facet, using its category and query value.
  renderFacet : function(facet, position) {
    var view = new VS.ui.SearchFacet({
      app   : this.app,
      model : facet,
      order : position
    });

    // Input first, facet second.
    this.renderSearchInput();
    this.facetViews.push(view);
    this.$('.VS-search-inner').children().eq(position*2).after(view.render().el);
    $('.search_input').children('textarea').css({'width':0,'height':0});
    view.calculateSize();
    _.defer(_.bind(view.calculateSize, view));
    $('.search_facet_input_container').css({'width': ($('.search_facet').width() - ($('.category').width() + 10) )+'px'})
    return view;
  },

  // Render a single input, used to create and autocomplete facets
  renderSearchInput : function() {
    var input = new VS.ui.SearchInput({
      position: this.inputViews.length,
      app: this.app,
      showFacets: this.options.showFacets
    });
    this.$('.VS-search-inner').append(input.render().el);
    this.inputViews.push(input);
  },

  // Handles showing/hiding the placeholder text
  renderPlaceholder : function() {
    var $placeholder = this.$('.VS-placeholder');
    if (this.app.searchQuery.length) {
      $placeholder.addClass("VS-hidden");
    } else {
      $placeholder.removeClass("VS-hidden")
                  .text(this.app.options.placeholder);
    }
  },

  // # Modifying Facets #

  // Clears out the search box. Command+A + delete can trigger this, as can a cancel button.
  //
  // If a `clearSearch` callback was provided, the callback is invoked and
  // provided with a function performs the actual removal of the data.  This
  // allows third-party developers to either clear data asynchronously, or
  // prior to performing their custom "clear" logic.
  clearSearch : function(e) {
    if (this.app.options.readOnly) return;
    var actualClearSearch = _.bind(function() {
      this.disableFacets();
      this.value('');
      this.flags.allSelected = false;
      this.searchEvent(e);
      this.focusSearch(e);
    }, this);

    if (this.app.options.callbacks.clearSearch != $.noop) {
      this.app.options.callbacks.clearSearch(actualClearSearch);
    } else {
      actualClearSearch();
    }
  },

  // Command+A selects all facets.
  selectAllFacets : function() {
    this.flags.allSelected = true;

    $(document).one('click.selectAllFacets', this.deselectAllFacets);

    _.each(this.facetViews, function(facetView, i) {
      facetView.selectFacet();
    });
    _.each(this.inputViews, function(inputView, i) {
      inputView.selectText();
    });
  },

  // Used by facets and input to see if all facets are currently selected.
  allSelected : function(deselect) {
    if (deselect) this.flags.allSelected = false;
    return this.flags.allSelected;
  },

  // After `selectAllFacets` is engaged, this method is bound to the entire document.
  // This immediate disables and deselects all facets, but it also checks if the user
  // has clicked on either a facet or an input, and properly selects the view.
  deselectAllFacets : function(e) {
    this.disableFacets();

    if (this.$(e.target).is('.category,textarea')) {
      var el   = $(e.target).closest('.search_facet,.search_input');
      var view = _.detect(this.facetViews.concat(this.inputViews), function(v) {
        return v.el == el[0];
      });
      if (view.type == 'facet') {
        view.selectFacet();
      } else if (view.type == 'textarea') {
        _.defer(function() {
          view.enableEdit(true);
        });
      }
    }
  },

  // Disables all facets except for the passed in view. Used when switching between
  // facets, so as not to have to keep state of active facets.
  disableFacets : function(keepView) {
    _.each(this.inputViews, function(view) {
      if (view && view != keepView &&
          (view.modes.editing == 'is' || view.modes.selected == 'is')) {
        view.disableEdit();
      }
    });
    _.each(this.facetViews, function(view) {
      if (view && view != keepView &&
          (view.modes.editing == 'is' || view.modes.selected == 'is')) {
        view.disableEdit();
        view.deselectFacet();
      }
    });

    this.flags.allSelected = false;
    this.removeFocus();
    $(document).unbind('click.selectAllFacets');
  },

  // Resize all inputs to account for extra keystrokes which may be changing the facet
  // width incorrectly. This is a safety check to ensure inputs are correctly sized.
  resizeFacets : function(view) {
    _.each(this.facetViews, function(facetView, i) {
      if (!view || facetView == view) {
        facetView.resize();
      }
    });
  },

  // Handles keydown events on the document. Used to complete the Cmd+A deletion, and
  // blurring focus.
  _maybeDisableFacets : function(e) {
    if (this.flags.allSelected && VS.app.hotkeys.key(e) == 'backspace') {
      e.preventDefault();
      this.clearSearch(e);
      return false;
    } else if (this.flags.allSelected && VS.app.hotkeys.printable(e)) {
      this.clearSearch(e);
    }
  },

  // # Focusing Facets #

  // Move focus between facets and inputs. Takes a direction as well as many options
  // for skipping over inputs and only to facets, placement of cursor position in facet
  // (i.e. at the end), and selecting the text in the input/facet.
  focusNextFacet : function(currentView, direction, options) {
    options = options || {};
    var viewCount    = this.facetViews.length;
    var viewPosition = options.viewPosition || this.viewPosition(currentView);

    if (!options.skipToFacet) {
      // Correct for bouncing between matching text and facet arrays.
      if (currentView.type == 'text'  && direction > 0) direction -= 1;
      if (currentView.type == 'facet' && direction < 0) direction += 1;
    } else if (options.skipToFacet && currentView.type == 'text' &&
               viewCount == viewPosition && direction >= 0) {
      // Special case of looping around to a facet from the last search input box.
      return false;
    }
    var view, next = Math.min(viewCount, viewPosition + direction);

    if (currentView.type == 'text') {
      if (next >= 0 && next < viewCount) {
        view = this.facetViews[next];
      } else if (next == viewCount) {
        view = this.inputViews[this.inputViews.length-1];
      }
      if (view && options.selectFacet && view.type == 'facet') {
        view.selectFacet();
      } else if (view) {
        view.enableEdit();
        view.setCursorAtEnd(direction || options.startAtEnd);
      }
    } else if (currentView.type == 'facet') {
      if (options.skipToFacet) {
        if (next >= viewCount || next < 0) {
          view = _.last(this.inputViews);
          view.enableEdit();
        } else {
          view = this.facetViews[next];
          view.enableEdit();
          view.setCursorAtEnd(direction || options.startAtEnd);
        }
      } else {
        view = this.inputViews[next];
        view.enableEdit();
      }
    }
    if (options.selectText) view.selectText();
    this.resizeFacets();

    return true;
  },

  maybeFocusSearch : function(e) {
    if (this.app.options.readOnly) return;
    if ($(e.target).is('.VS-search-box') ||
        $(e.target).is('.VS-search-inner') ||
        e.type == 'keydown') {
      this.focusSearch(e);
    }
  },

  // Bring focus to last input field.
  focusSearch : function(e, selectText) {
    if (this.app.options.readOnly) return;
    var view = this.inputViews[this.inputViews.length-1];
    view.enableEdit(selectText);
    if (!selectText) view.setCursorAtEnd(-1);
    if (e.type == 'keydown') {
      view.keydown(e);
      view.box.trigger('keydown');
    }
    _.defer(_.bind(function() {
      if (!this.$('textarea:focus').length) {
        view.enableEdit(selectText);
      }
    }, this));
  },

  // Double-clicking on the search wrapper should select the existing text in
  // the last search input. Also start the triple-click timer.
  highlightSearch : function(e) {
    if (this.app.options.readOnly) return;
    if ($(e.target).is('.VS-search-box') ||
        $(e.target).is('.VS-search-inner') ||
        e.type == 'keydown') {
      var lastinput = this.inputViews[this.inputViews.length-1];
      lastinput.startTripleClickTimer();
      this.focusSearch(e, true);
    }
  },

  maybeTripleClick : function(e) {
    var lastinput = this.inputViews[this.inputViews.length-1];
    return lastinput.maybeTripleClick(e);
  },

  // Used to show the user is focused on some input inside the search box.
  addFocus : function() {
    if (this.app.options.readOnly) return;
    this.app.options.callbacks.focus();
    this.$('.VS-search-box').addClass('VS-focus');
  },

  // User is no longer focused on anything in the search box.
  removeFocus : function() {
    this.app.options.callbacks.blur();
    var focus = _.any(this.facetViews.concat(this.inputViews), function(view) {
      return view.isFocused();
    });
    if (!focus) this.$('.VS-search-box').removeClass('VS-focus');
  },

  // Show a menu which adds pre-defined facets to the search box. This is unused for now.
  showFacetCategoryMenu : function(e) {
    e.preventDefault();
    e.stopPropagation();
    if (this.facetCategoryMenu && this.facetCategoryMenu.modes.open == 'is') {
      return this.facetCategoryMenu.close();
    }

    var items = [
      {title: 'Account', onClick: _.bind(this.addFacet, this, 'account', '')},
      {title: 'Project', onClick: _.bind(this.addFacet, this, 'project', '')},
      {title: 'Filter', onClick: _.bind(this.addFacet, this, 'filter', '')},
      {title: 'Access', onClick: _.bind(this.addFacet, this, 'access', '')}
    ];

    var menu = this.facetCategoryMenu || (this.facetCategoryMenu = new dc.ui.Menu({
      items       : items,
      standalone  : true
    }));

    this.$('.VS-icon-search').after(menu.render().open().content);
    return false;
  }

});

})();

(function() {

var $ = jQuery; // Handle namespaced jQuery

// This is the visual search facet that holds the category and its autocompleted
// input field.
VS.ui.SearchFacet = Backbone.View.extend({

  type : 'facet',

  className : 'search_facet',

  events : {
    'click .category'           : 'selectFacet',
    'keydown textarea'             : 'keydown',
    'mousedown textarea'           : 'enableEdit',
    'mouseover .VS-icon-cancel' : 'showDelete',
    'mouseout .VS-icon-cancel'  : 'hideDelete',
    'click .VS-icon-cancel'     : 'remove'
  },

  initialize : function(options) {
    this.options = _.extend({}, this.options, options);

    this.flags = {
      canClose : false
    };
    _.bindAll(this, 'set', 'keydown', 'deselectFacet', 'deferDisableEdit');
    this.app = this.options.app;
  },

  // Rendering the facet sets up autocompletion, events on blur, and populates
  // the facet's input with its starting value.
  render : function() {
    $(this.el).html(JST['search_facet']({
      model : this.model,
      readOnly: this.app.options.readOnly
    }));

    this.setMode('not', 'editing');
    this.setMode('not', 'selected');
    this.box = this.$('textarea');
    this.box.val(this.model.label());
    this.box.bind('blur', this.deferDisableEdit);
    // Handle paste events with `propertychange`
    this.box.bind('textarea propertychange', this.keydown);
    this.setupAutocomplete();
    return this;
  },

  // This method is used to setup the facet's input to auto-grow.
  // This is defered in the searchBox so it can be attached to the
  // DOM to get the correct font-size.
  calculateSize : function() {
    this.box.autoGrowInput();
    //this.box.unbind('updated.autogrow');
    this.box.bind('updated.autogrow', _.bind(this.moveAutocomplete, this));
  },

  // Forces a recalculation of this facet's input field's value. Called when
  // the facet is focused, removed, or otherwise modified.
  resize : function(e) {
   // this.box.trigger('resize.autogrow', e);
  },

  // Watches the facet's input field to see if it matches the beginnings of
  // words in `autocompleteValues`, which is different for every category.
  // If the value, when selected from the autocompletion menu, is different
  // than what it was, commit the facet and search for it.
  setupAutocomplete : function() {
    this.box.autocomplete({
      source    : _.bind(this.autocompleteValues, this),
      minLength : 0,
      delay     : 0,
      autoFocus : true,
      position  : {offset : "0 5"},
      create    : _.bind(function(e, ui) {
        $(this.el).find('.ui-autocomplete-input').css('z-index','auto');
      }, this),
      select    : _.bind(function(e, ui) {
        e.preventDefault();
        var originalValue = this.model.get('value');
        this.set(ui.item.value);
        if (originalValue != ui.item.value || this.box.val() != ui.item.value) {
          if (this.app.options.autosearch) {
            this.search(e);
          } else {
              this.app.searchBox.renderFacets();
              this.app.searchBox.focusNextFacet(this, 1, {viewPosition: this.options.order});
          }
        }
        return false;
      }, this),
      open      : _.bind(function(e, ui) {
        var box = this.box;
        this.box.autocomplete('widget').find('.ui-menu-item').each(function() {
          var $value = $(this),
              autoCompleteData = $value.data('item.autocomplete') || $value.data('ui-autocomplete-item');

          if (autoCompleteData['value'] == box.val() && box.data('ui-autocomplete').menu.activate) {
            box.data('ui-autocomplete').menu.activate(new $.Event("mouseover"), $value);
          }
        });
      }, this)
    });
    this.box.autocomplete('widget').addClass('VS-interface');
  },

  // As the facet's input field grows, it may move to the next line in the
  // search box. `autoGrowInput` triggers an `updated` event on the input
  // field, which is bound to this method to move the autocomplete menu.
  moveAutocomplete : function() {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) {
      autocomplete.menu.element.position({
        my        : "left top",
        at        : "left bottom",
        of        : this.box.data('ui-autocomplete').element,
        collision : "flip",
        offset    : "0 5"
      });
    }
  },

  // When a user enters a facet and it is being edited, immediately show
  // the autocomplete menu and size it to match the contents.
  searchAutocomplete : function(e) {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) {
      var menu = autocomplete.menu.element;
      autocomplete.search();

      // Resize the menu based on the correctly measured width of what's bigger:
      // the menu's original size or the menu items' new size.
      menu.outerWidth(Math.max(
        menu.width('').outerWidth(),
        autocomplete.element.outerWidth()
      ));
    }
  },

  // Closes the autocomplete menu. Called on disabling, selecting, deselecting,
  // and anything else that takes focus out of the facet's input field.
  closeAutocomplete : function() {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) autocomplete.close();
  },

  // Search terms used in the autocomplete menu. These are specific to the facet,
  // and only match for the facet's category. The values are then matched on the
  // first letter of any word in matches, and finally sorted according to the
  // value's own category. You can pass `preserveOrder` as an option in the
  // `facetMatches` callback to skip any further ordering done client-side.
  autocompleteValues : function(req, resp) {
    var category = this.model.get('category');
    var value    = this.model.get('value');
    var searchTerm = req.term;

    this.app.options.callbacks.valueMatches(category, searchTerm, function(matches, options) {
      options = options || {};
      matches = matches || [];

      if (searchTerm && value != searchTerm) {
        if (options.preserveMatches) {
          resp(matches);
        } else {
          var re = VS.utils.inflector.escapeRegExp(searchTerm || '');
          var matcher = new RegExp('\\b' + re, 'i');
          matches = $.grep(matches, function(item) {
            return matcher.test(item) ||
                   matcher.test(item.value) ||
                   matcher.test(item.label);
        });
        }
      }

      if (options.preserveOrder) {
        resp(matches);
      } else {
        resp(_.sortBy(matches, function(match) {
          if (match == value || match.value == value) return '';
          else return match;
        }));
      }
    });

  },

  // Sets the facet's model's value.
  set : function(value) {
    if (!value) return;
    this.model.set({'value': value});
  },

  // Before the searchBox performs a search, we need to close the
  // autocomplete menu.
  search : function(e, direction) {
    if (!direction) direction = 1;
    this.closeAutocomplete();
    this.app.searchBox.searchEvent(e);
    _.defer(_.bind(function() {
      this.app.searchBox.focusNextFacet(this, direction, {viewPosition: this.options.order});
    }, this));
  },

  // Begin editing the facet's input. This is called when the user enters
  // the input either from another facet or directly clicking on it.
  //
  // This method tells all other facets and inputs to disable so it can have
  // the sole focus. It also prepares the autocompletion menu.
  enableEdit : function() {
    if (this.app.options.readOnly) return;
    if (this.modes.editing != 'is') {
      this.setMode('is', 'editing');
      this.deselectFacet();
      if (this.box.val() == '') {
        this.box.val(this.model.get('value'));
      }
    }

    this.flags.canClose = false;
    this.app.searchBox.disableFacets(this);
    this.app.searchBox.addFocus();
    _.defer(_.bind(function() {
      this.app.searchBox.addFocus();
    }, this));
    this.resize();
    this.searchAutocomplete();
    this.box.focus();
  },

  // When the user blurs the input, they may either be going to another input
  // or off the search box entirely. If they go to another input, this facet
  // will be instantly disabled, and the canClose flag will be turned back off.
  //
  // However, if the user clicks elsewhere on the page, this method starts a timer
  // that checks if any of the other inputs are selected or are being edited. If
  // not, then it can finally close itself and its autocomplete menu.
  deferDisableEdit : function() {
    this.flags.canClose = true;
    _.delay(_.bind(function() {
      if (this.flags.canClose && !this.box.is(':focus') &&
          this.modes.editing == 'is' && this.modes.selected != 'is') {
        this.disableEdit();
      }
    }, this), 250);
  },

  // Called either by other facets receiving focus or by the timer in `deferDisableEdit`,
  // this method will turn off the facet, remove any text selection, and close
  // the autocomplete menu.
  disableEdit : function() {
    var newFacetQuery = VS.utils.inflector.trim(this.box.val());
    if (newFacetQuery != this.model.get('value')) {
      this.set(newFacetQuery);
    }
    this.flags.canClose = false;
    this.box.selectRange(0, 0);
    this.box.blur();
    this.setMode('not', 'editing');
    this.closeAutocomplete();
    this.app.searchBox.removeFocus();
  },

  // Selects the facet, which blurs the facet's input and highlights the facet.
  // If this is the only facet being selected (and not part of a select all event),
  // we attach a mouse/keyboard watcher to check if the next action by the user
  // should delete this facet or just deselect it.
  selectFacet : function(e) {
    if (e) e.preventDefault();
    if (this.app.options.readOnly) return;
    var allSelected = this.app.searchBox.allSelected();
    if (this.modes.selected == 'is') return;

    if (this.box.is(':focus')) {
      this.box.setCursorPosition(0);
      this.box.blur();
    }

    this.flags.canClose = false;
    this.closeAutocomplete();
    this.setMode('is', 'selected');
    this.setMode('not', 'editing');
    if (!allSelected || e) {
      $(document).unbind('keydown.facet', this.keydown);
      $(document).unbind('click.facet', this.deselectFacet);
      _.defer(_.bind(function() {
        $(document).unbind('keydown.facet').bind('keydown.facet', this.keydown);
        $(document).unbind('click.facet').one('click.facet', this.deselectFacet);
      }, this));
      this.app.searchBox.disableFacets(this);
      this.app.searchBox.addFocus();
    }
    return false;
  },

  // Turns off highlighting on the facet. Called in a variety of ways, this
  // only deselects the facet if it is selected, and then cleans up the
  // keyboard/mouse watchers that were created when the facet was first
  // selected.
  deselectFacet : function(e) {
    if (e) e.preventDefault();
    if (this.modes.selected == 'is') {
      this.setMode('not', 'selected');
      this.closeAutocomplete();
      this.app.searchBox.removeFocus();
    }
    $(document).unbind('keydown.facet', this.keydown);
    $(document).unbind('click.facet', this.deselectFacet);
    return false;
  },

  // Is the user currently focused in this facet's input field?
  isFocused : function() {
    return this.box.is(':focus');
  },

  // Hovering over the delete button styles the facet so the user knows that
  // the delete button will kill the entire facet.
  showDelete : function() {
    $(this.el).addClass('search_facet_maybe_delete');
  },

  // On `mouseout`, the user is no longer hovering on the delete button.
  hideDelete : function() {
    $(this.el).removeClass('search_facet_maybe_delete');
  },

  // When switching between facets, depending on the direction the cursor is
  // coming from, the cursor in this facet's input field should match the original
  // direction.
  setCursorAtEnd : function(direction) {
    if (direction == -1) {
      this.box.setCursorPosition(this.box.val().length);
    } else {
      this.box.setCursorPosition(0);
    }
  },

  // Deletes the facet and sends the cursor over to the nearest input field.
  remove : function(e) {
    var committed = this.model.get('value');
    this.deselectFacet();
    this.disableEdit();
    this.app.searchQuery.remove(this.model);
    if (committed && this.app.options.autosearch) {
      this.search(e, -1);
    } else {
      this.app.searchBox.renderFacets();
      this.app.searchBox.focusNextFacet(this, -1, {viewPosition: this.options.order});
    }
  },

  // Selects the text in the facet's input field. When the user tabs between
  // facets, convention is to highlight the entire field.
  selectText: function() {
    this.box.selectRange(0, this.box.val().length);
  },

  // Handles all keyboard inputs when in the facet's input field. This checks
  // for movement between facets and inputs, entering a new value that needs
  // to be autocompleted, as well as the removal of this facet.
  keydown : function(e) {
    var key = VS.app.hotkeys.key(e);

    if (key == 'enter' && this.box.val()) {
      this.disableEdit();
      this.search(e);
    } else if (key == 'left') {
      if (this.modes.selected == 'is') {
        this.deselectFacet();
        this.app.searchBox.focusNextFacet(this, -1, {startAtEnd: -1});
      } else if (this.box.getCursorPosition() == 0 && !this.box.getSelection().length) {
        this.selectFacet();
      }
    } else if (key == 'right') {
      if (this.modes.selected == 'is') {
        e.preventDefault();
        this.deselectFacet();
        this.setCursorAtEnd(0);
        this.enableEdit();
      } else if (this.box.getCursorPosition() == this.box.val().length) {
        e.preventDefault();
        this.disableEdit();
        this.app.searchBox.focusNextFacet(this, 1);
      }
    } else if (VS.app.hotkeys.shift && key == 'tab') {
      e.preventDefault();
      this.app.searchBox.focusNextFacet(this, -1, {
        startAtEnd  : -1,
        skipToFacet : true,
        selectText  : true
      });
    } else if (key == 'tab') {
      e.preventDefault();
      this.app.searchBox.focusNextFacet(this, 1, {
        skipToFacet : true,
        selectText  : true
      });
    } else if (VS.app.hotkeys.command && (e.which == 97 || e.which == 65)) {
      e.preventDefault();
      this.app.searchBox.selectAllFacets();
      return false;
    } else if (VS.app.hotkeys.printable(e) && this.modes.selected == 'is') {
      this.app.searchBox.focusNextFacet(this, -1, {startAtEnd: -1});
      this.remove(e);
    } else if (key == 'backspace') {
       $(document).on('keydown.backspace', function(e) {
          if (VS.app.hotkeys.key(e) === 'backspace') {
             e.preventDefault();
          }
       });

       $(document).on('keyup.backspace', function(e) {
          $(document).off('.backspace');
       });

      if (this.modes.selected == 'is') {
        e.preventDefault();
        this.remove(e);
      } else if (this.box.getCursorPosition() == 0 &&
                 !this.box.getSelection().length) {
        e.preventDefault();
        this.selectFacet();
      }
       e.stopPropagation();
    }

    // Handle paste events
    if (e.which == null) {
        // this.searchAutocomplete(e);
        _.defer(_.bind(this.resize, this, e));
    } else {
      this.resize(e);
    }
  }

});

})();

(function() {

var $ = jQuery; // Handle namespaced jQuery

// This is the visual search input that is responsible for creating new facets.
// There is one input placed in between all facets.
VS.ui.SearchInput = Backbone.View.extend({

  type : 'text',

  className : 'search_input ui-menu',

  events : {
    'keypress textarea'  : 'keypress',
    'keydown textarea'   : 'keydown',
    'keyup textarea'     : 'keyup',
    'click textarea'     : 'maybeTripleClick',
    'dblclick textarea'  : 'startTripleClickTimer'
  },

  initialize : function(options) {
    this.options = _.extend({}, this.options, options);
    
    this.app = this.options.app;
    this.flags = {
      canClose : false
    };
    _.bindAll(this, 'removeFocus', 'addFocus', 'moveAutocomplete', 'deferDisableEdit');
  },

  // Rendering the input sets up autocomplete, events on focusing and blurring
  // the input, and the auto-grow of the input.
  render : function() {
    $(this.el).html(JST['search_input']({
      readOnly: this.app.options.readOnly
    }));

    this.setMode('not', 'editing');
    this.setMode('not', 'selected');
    this.box = this.$('textarea');
    this.box.autoGrowInput();
    this.box.bind('updated.autogrow', this.moveAutocomplete);
    this.box.bind('blur',  this.deferDisableEdit);
    this.box.bind('focus', this.addFocus);
    this.setupAutocomplete();

    return this;
  },

  // Watches the input and presents an autocompleted menu, taking the
  // remainder of the input field and adding a separate facet for it.
  //
  // See `addTextFacetRemainder` for explanation on how the remainder works.
  setupAutocomplete : function() {
    this.box.autocomplete({
      appendTo :(this.options.app.options.container) ? this.options.app.options.container : null,
      minLength : this.options.showFacets ? 0 : 1,
      delay     : 50,
      autoFocus : true,
      position  : {offset : "0 -1"},
      source    : _.bind(this.autocompleteValues, this),
      // Prevent changing the input value on focus of an option
      focus     : function() { return false; },
      create    : _.bind(function(e, ui) {
        $(this.el).find('.ui-autocomplete-input').css('z-index','auto');
      }, this),
      select    : _.bind(function(e, ui) {
        e.preventDefault();
        // stopPropogation does weird things in jquery-ui 1.9
        // e.stopPropagation();
        var remainder = this.addTextFacetRemainder(ui.item.label || ui.item.value);
        var position  = this.options.position + (remainder ? 1 : 0);
        this.app.searchBox.addFacet(ui.item instanceof String ? ui.item : ui.item.value, '', position);
        return false;
      }, this)
    });

    // Renders the results grouped by the categories they belong to.
    this.box.data('ui-autocomplete')._renderMenu = function(ul, items) {
      var category = '';
      _.each(items, _.bind(function(item, i) {
        if (item.category && item.category != category) {
          ul.append('<li class="ui-autocomplete-category">'+item.category+'</li>');
          category = item.category;
        }

        if(this._renderItemData) {
          this._renderItemData(ul, item);
        } else {
          this._renderItem(ul, item);
        }

      }, this));
    };

    this.box.autocomplete('widget').addClass('VS-interface');
  },

  // Search terms used in the autocomplete menu. The values are matched on the
  // first letter of any word in matches, and finally sorted according to the
  // value's own category. You can pass `preserveOrder` as an option in the
  // `facetMatches` callback to skip any further ordering done client-side.
  autocompleteValues : function(req, resp) {
    var searchTerm = req.term;
    var lastWord   = searchTerm.match(/\w+\*?$/); // Autocomplete only last word.
    var re         = VS.utils.inflector.escapeRegExp(lastWord && lastWord[0] || '');
    this.app.options.callbacks.facetMatches(function(prefixes, options) {
      options = options || {};
      prefixes = prefixes || [];

      // Only match from the beginning of the word.
      var matcher    = new RegExp('^' + re, 'i');
      var matches    = $.grep(prefixes, function(item) {
        return item && matcher.test(item.label || item);
      });

      if (options.preserveOrder) {
        resp(matches);
      } else {
        resp(_.sortBy(matches, function(match) {
          if (match.label) return match.category + '-' + match.label;
          else             return match;
        }));
      }
    });

  },

  // Closes the autocomplete menu. Called on disabling, selecting, deselecting,
  // and anything else that takes focus out of the facet's input field.
  closeAutocomplete : function() {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) autocomplete.close();
  },

  // As the input field grows, it may move to the next line in the
  // search box. `autoGrowInput` triggers an `updated` event on the input
  // field, which is bound to this method to move the autocomplete menu.
  moveAutocomplete : function() {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) {
      autocomplete.menu.element.position({
        my        : "left top",
        at        : "left bottom",
        of        : this.box.data('ui-autocomplete').element,
        collision : "none",
        offset    : '0 -1'
      });
    }
  },

  // When a user enters a facet and it is being edited, immediately show
  // the autocomplete menu and size it to match the contents.
  searchAutocomplete : function(e) {
    var autocomplete = this.box.data('ui-autocomplete');
    if (autocomplete) {
      var menu = autocomplete.menu.element;
      autocomplete.search();

      // Resize the menu based on the correctly measured width of what's bigger:
      // the menu's original size or the menu items' new size.
      menu.outerWidth(Math.max(
        menu.width('').outerWidth(),
        autocomplete.element.outerWidth()
      ));
    }
  },

  // If a user searches for "word word category", the category would be
  // matched and autocompleted, and when selected, the "word word" would
  // also be caught as the remainder and then added in its own facet.
  addTextFacetRemainder : function(facetValue) {
    var boxValue = this.box.val();
    var lastWord = boxValue.match(/\b(\w+)$/);

    if (!lastWord) {
      return '';
    }

    var matcher = new RegExp(lastWord[0], "i");
    if (facetValue.search(matcher) == 0) {
      boxValue = boxValue.replace(/\b(\w+)$/, '');
    }
    boxValue = boxValue.replace('^\s+|\s+$', '');

    if (boxValue) {
      this.app.searchBox.addFacet(this.app.options.remainder, boxValue, this.options.position);
    }

    return boxValue;
  },

  // Directly called to focus the input. This is different from `addFocus`
  // because this is not called by a focus event. This instead calls a
  // focus event causing the input to become focused.
  enableEdit : function(selectText) {
    this.addFocus();
    if (selectText) {
      this.selectText();
    }
    this.box.focus();
  },

  // Event called on user focus on the input. Tells all other input and facets
  // to give up focus, and starts revving the autocomplete.
  addFocus : function() {
    this.flags.canClose = false;
    if (!this.app.searchBox.allSelected()) {
      this.app.searchBox.disableFacets(this);
    }
    this.app.searchBox.addFocus();
    this.setMode('is', 'editing');
    this.setMode('not', 'selected');
    if (!this.app.searchBox.allSelected()) {
        this.searchAutocomplete();
    }
  },

  // Directly called to blur the input. This is different from `removeFocus`
  // because this is not called by a blur event.
  disableEdit : function() {
    this.box.blur();
    this.removeFocus();
  },

  // Event called when user blur's the input, either through the keyboard tabbing
  // away or the mouse clicking off. Cleans up
  removeFocus : function() {
    this.flags.canClose = false;
    this.app.searchBox.removeFocus();
    this.setMode('not', 'editing');
    this.setMode('not', 'selected');
    this.closeAutocomplete();
  },

  // When the user blurs the input, they may either be going to another input
  // or off the search box entirely. If they go to another input, this facet
  // will be instantly disabled, and the canClose flag will be turned back off.
  //
  // However, if the user clicks elsewhere on the page, this method starts a timer
  // that checks if any of the other inputs are selected or are being edited. If
  // not, then it can finally close itself and its autocomplete menu.
  deferDisableEdit : function() {
    this.flags.canClose = true;
    _.delay(_.bind(function() {
      if (this.flags.canClose &&
          !this.box.is(':focus') &&
          this.modes.editing == 'is') {
        this.disableEdit();
      }
    }, this), 250);
  },

  // Starts a timer that will cause a triple-click, which highlights all facets.
  startTripleClickTimer : function() {
    this.tripleClickTimer = setTimeout(_.bind(function() {
      this.tripleClickTimer = null;
    }, this), 500);
  },

  // Event on click that checks if a triple click is in play. The
  // `tripleClickTimer` is counting down, ready to be engaged and intercept
  // the click event to force a select all instead.
  maybeTripleClick : function(e) {
    if (this.app.options.readOnly) return;
    if (!!this.tripleClickTimer) {
      e.preventDefault();
      this.app.searchBox.selectAllFacets();
      return false;
    }
  },

  // Is the user currently focused in the input field?
  isFocused : function() {
    return this.box.is(':focus');
  },

  // When serializing the facets, the inputs need to also have their values represented,
  // in case they contain text that is not yet faceted (but will be once the search is
  // completed).
  value : function() {
    return this.box.val();
  },

  // When switching between facets and inputs, depending on the direction the cursor
  // is coming from, the cursor in this facet's input field should match the original
  // direction.
  setCursorAtEnd : function(direction) {
    if (direction == -1) {
      this.box.setCursorPosition(this.box.val().length);
    } else {
      this.box.setCursorPosition(0);
    }
  },

  // Selects the entire range of text in the input. Useful when tabbing between inputs
  // and facets.
  selectText : function() {
    this.box.selectRange(0, this.box.val().length);
    if (!this.app.searchBox.allSelected()) {
      this.box.focus();
    } else {
      this.setMode('is', 'selected');
    }
  },

  // Before the searchBox performs a search, we need to close the
  // autocomplete menu.
  search : function(e, direction) {
    if (!direction) direction = 0;
    this.closeAutocomplete();
    this.app.searchBox.searchEvent(e);
    _.defer(_.bind(function() {
      this.app.searchBox.focusNextFacet(this, direction);
    }, this));
  },

  // Callback fired on key press in the search box. We search when they hit return.
  keypress : function(e) {
    var key = VS.app.hotkeys.key(e);
    if (key == 'enter') {
      return this.search(e, 100);
    } else if (VS.app.hotkeys.colon(e)) {
     // this.box.trigger('resize.autogrow', e);
      var query    = this.box.val();
      var prefixes = [];
      this.app.options.callbacks.facetMatches(function(p) {
          prefixes = p;
      });
      var labels   = _.map(prefixes, function(prefix) {
        if (prefix.label) return prefix.label;
        else              return prefix;
      });
      if (_.contains(labels, query)) {
        e.preventDefault();
        var remainder = this.addTextFacetRemainder(query);
        var position  = this.options.position + (remainder?1:0);
        this.app.searchBox.addFacet(query, '', position);
        return false;
      }
    } else if (key == 'backspace') {
      if (this.box.getCursorPosition() == 0 && !this.box.getSelection().length) {
        e.preventDefault();
        e.stopPropagation();
        e.stopImmediatePropagation();
        this.app.searchBox.resizeFacets();
        return false;
      }
    }
  },

  // Handles all keyboard inputs when in the input field. This checks
  // for movement between facets and inputs, entering a new value that needs
  // to be autocompleted, as well as stepping between facets with backspace.
  keydown : function(e) {
    var key = VS.app.hotkeys.key(e);

    if (key == 'left') {
      if (this.box.getCursorPosition() == 0) {
        e.preventDefault();
        this.app.searchBox.focusNextFacet(this, -1, {startAtEnd: -1});
      }
    } else if (key == 'right') {
      if (this.box.getCursorPosition() == this.box.val().length) {
        e.preventDefault();
        this.app.searchBox.focusNextFacet(this, 1, {selectFacet: true});
      }
    } else if (VS.app.hotkeys.shift && key == 'tab') {
      e.preventDefault();
      this.app.searchBox.focusNextFacet(this, -1, {selectText: true});
    } else if (key == 'tab') {
      var value = this.box.val();
      if (value.length) {
        e.preventDefault();
        var remainder = this.addTextFacetRemainder(value);
        var position  = this.options.position + (remainder?1:0);
        if (value != remainder) {
            this.app.searchBox.addFacet(value, '', position);
        }
      } else {
        var foundFacet = this.app.searchBox.focusNextFacet(this, 0, {
          skipToFacet: true,
          selectText: true
        });
        if (foundFacet) {
          e.preventDefault();
        }
      }
    } else if (VS.app.hotkeys.command &&
               String.fromCharCode(e.which).toLowerCase() == 'a') {
      e.preventDefault();
      this.app.searchBox.selectAllFacets();
      return false;
    } else if (key == 'backspace' && !this.app.searchBox.allSelected()) {
      if (this.box.getCursorPosition() == 0 && !this.box.getSelection().length) {
        e.preventDefault();
        this.app.searchBox.focusNextFacet(this, -1, {backspace: true});
        return false;
      }
    } else if (key == 'end') {
      var view = this.app.searchBox.inputViews[this.app.searchBox.inputViews.length-1];
      view.setCursorAtEnd(-1);
    } else if (key == 'home') {
      var view = this.app.searchBox.inputViews[0];
      view.setCursorAtEnd(-1);
    }

  },

  // We should get the value of an input should be done
  // on keyup since keydown gets the previous value and not the current one
  keyup : function(e) {
    //this.box.trigger('resize.autogrow', e);
  }

});

})();

(function(){

  var $ = jQuery; // Handle namespaced jQuery

  // Makes the view enter a mode. Modes have both a 'mode' and a 'group',
  // and are mutually exclusive with any other modes in the same group.
  // Setting will update the view's modes hash, as well as set an HTML class
  // of *[mode]_[group]* on the view's element. Convenient way to swap styles
  // and behavior.
  Backbone.View.prototype.setMode = function(mode, group) {
    this.modes || (this.modes = {});
    if (this.modes[group] === mode) return;
    $(this.el).setMode(mode, group);
    this.modes[group] = mode;
  };

})();
(function() {

var $ = jQuery; // Handle namespaced jQuery

// DocumentCloud workspace hotkeys. To tell if a key is currently being pressed,
// just ask `VS.app.hotkeys.[key]` on `keypress`, or ask `VS.app.hotkeys.key(e)`
// on `keydown`.
//
// For the most headache-free way to use this utility, check modifier keys,
// like shift and command, with `VS.app.hotkeys.shift`, and check every other
// key with `VS.app.hotkeys.key(e) == 'key_name'`.
VS.app.hotkeys = {

  // Keys that will be mapped to the `hotkeys` namespace.
  KEYS: {
    '16':  'shift',
    '17':  'command',
    '91':  'command',
    '93':  'command',
    '224': 'command',
    '13':  'enter',
    '37':  'left',
    '38':  'upArrow',
    '39':  'right',
    '40':  'downArrow',
    '46':  'delete',
    '8':   'backspace',
    '35':  'end',
    '36':  'home',
    '9':   'tab',
    '188': 'comma'
  },

  // Binds global keydown and keyup events to listen for keys that match `this.KEYS`.
  initialize : function() {
    _.bindAll(this, 'down', 'up', 'blur');
    $(document).bind('keydown', this.down);
    $(document).bind('keyup', this.up);
    $(window).bind('blur', this.blur);
  },

  // On `keydown`, turn on all keys that match.
  down : function(e) {
    var key = this.KEYS[e.which];
    if (key) this[key] = true;
  },

  // On `keyup`, turn off all keys that match.
  up : function(e) {
    var key = this.KEYS[e.which];
    if (key) this[key] = false;
  },

  // If an input is blurred, all keys need to be turned off, since they are no longer
  // able to modify the document.
  blur : function(e) {
    for (var key in this.KEYS) this[this.KEYS[key]] = false;
  },

  // Check a key from an event and return the common english name.
  key : function(e) {
    return this.KEYS[e.which];
  },

  // Colon is special, since the value is different between browsers.
  colon : function(e) {
    var charCode = e.which;
    return charCode && String.fromCharCode(charCode) == ":";
  },

  // Check a key from an event and match it against any known characters.
  // The `keyCode` is different depending on the event type: `keydown` vs. `keypress`.
  //
  // These were determined by looping through every `keyCode` and `charCode` that
  // resulted from `keydown` and `keypress` events and counting what was printable.
  printable : function(e) {
    var code = e.which;
    if (e.type == 'keydown') {
      if (code == 32 ||                      // space
          (code >= 48 && code <= 90) ||      // 0-1a-z
          (code >= 96 && code <= 111) ||     // 0-9+-/*.
          (code >= 186 && code <= 192) ||    // ;=,-./^
          (code >= 219 && code <= 222)) {    // (\)'
        return true;
      }
    } else {
      // [space]!"#$%&'()*+,-.0-9:;<=>?@A-Z[\]^_`a-z{|} and unicode characters
      if ((code >= 32 && code <= 126)  ||
          (code >= 160 && code <= 500) ||
          (String.fromCharCode(code) == ":")) {
        return true;
      }
    }
    return false;
  }

};

})();
(function() {

var $ = jQuery; // Handle namespaced jQuery

// Naive English transformations on words. Only used for a few transformations 
// in VisualSearch.js.
VS.utils.inflector = {

  // Delegate to the ECMA5 String.prototype.trim function, if available.
  trim : function(s) {
    return s.trim ? s.trim() : s.replace(/^\s+|\s+$/g, '');
  },
  
  // Escape strings that are going to be used in a regex. Escapes punctuation
  // that would be incorrect in a regex.
  escapeRegExp : function(s) {
    return s.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1');
  }
};

})();
(function() {

var $ = jQuery; // Handle namespaced jQuery

$.fn.extend({

  // Makes the selector enter a mode. Modes have both a 'mode' and a 'group',
  // and are mutually exclusive with any other modes in the same group.
  // Setting will update the view's modes hash, as well as set an HTML class
  // of *[mode]_[group]* on the view's element. Convenient way to swap styles
  // and behavior.
  setMode : function(state, group) {
    group    = group || 'mode';
    var re   = new RegExp("\\w+_" + group + "(\\s|$)", 'g');
    var mode = (state === null) ? "" : state + "_" + group;
    this.each(function() {
      this.className = (this.className.replace(re, '')+' '+mode)
                       .replace(/\s\s/g, ' ');
    });
    return mode;
  },

  // When attached to an input element, this will cause the width of the input
  // to match its contents. This calculates the width of the contents of the input
  // by measuring a hidden shadow div that should match the styling of the input.
  autoGrowInput: function() {
    return this.each(function() {
      var $input  = $(this);
      var $tester = $('<div />').css({
        opacity     : 0,
        top         : -9999,
        left        : -9999,
        position    : 'absolute',
        whiteSpace  : 'nowrap'
      }).addClass('VS-input-width-tester').addClass('VS-interface');

      // Watch for input value changes on all of these events. `resize`
      // event is called explicitly when the input has been changed without
      // a single keypress.
      var events = {};
      $input.next('.VS-input-width-tester').remove();
      $input.after($tester);
      $input.unbind(events).bind(events, function(e, realEvent) {
        if (realEvent) e = realEvent;
        var value = $input.val();

        // Watching for the backspace key is tricky because it may not
        // actually be deleting the character, but instead the key gets
        // redirected to move the cursor from facet to facet.
        if (VS.app.hotkeys.key(e) == 'backspace') {
          var position = $input.getCursorPosition();
          if (position > 0) value = value.slice(0, position-1) +
                                    value.slice(position, value.length);
        } else if (VS.app.hotkeys.printable(e) &&
                   !VS.app.hotkeys.command) {
          value += String.fromCharCode(e.which);
        }
        value = value.replace(/&/g, '&amp;')
                     .replace(/\s/g,'&nbsp;')
                     .replace(/</g, '&lt;')
                     .replace(/>/g, '&gt;');

        $tester.html(value);

        $input.width($tester.width() + 10 + parseInt($input.css('min-width')));
        //$input.trigger('updated.autogrow');
      });

      // Sets the width of the input on initialization.
      //$input.trigger('resize.autogrow');
    });
  },


  // Cross-browser method used for calculating where the cursor is in an
  // input field.
  getCursorPosition: function() {
    var position = 0;
    var input    = this.get(0);

    if (document.selection) { // IE
      input.focus();
      var sel    = document.selection.createRange();
      var selLen = document.selection.createRange().text.length;
      sel.moveStart('character', -input.value.length);
      position   = sel.text.length - selLen;
    } else if (input && $(input).is(':visible') &&
               input.selectionStart != null) { // Firefox/Safari
      position = input.selectionStart;
    }

    return position;
  },

  // A simple proxy for `selectRange` that sets the cursor position in an
  // input field.
  setCursorPosition: function(position) {
    return this.each(function() {
      return $(this).selectRange(position, position);
    });
  },

  // Cross-browser way to select text in an input field.
  selectRange: function(start, end) {
    return this.filter(':visible').each(function() {
      if (this.setSelectionRange) { // FF/Webkit
        this.focus();
        this.setSelectionRange(start, end);
      } else if (this.createTextRange) { // IE
        var range = this.createTextRange();
        range.collapse(true);
        range.moveEnd('character', end);
        range.moveStart('character', start);
        if (end - start >= 0) range.select();
      }
    });
  },

  // Returns an object that contains the text selection range values for
  // an input field.
  getSelection: function() {
    var input = this[0];

    if (input.selectionStart != null) { // FF/Webkit
      var start = input.selectionStart;
      var end   = input.selectionEnd;
      return {
        start   : start,
        end     : end,
        length  : end-start,
        text    : input.value.substr(start, end-start)
      };
    } else if (document.selection) { // IE
      var range = document.selection.createRange();
      if (range) {
        var textRange = input.createTextRange();
        var copyRange = textRange.duplicate();
        textRange.moveToBookmark(range.getBookmark());
        copyRange.setEndPoint('EndToStart', textRange);
        var start = copyRange.text.length;
        var end   = start + range.text.length;
        return {
          start   : start,
          end     : end,
          length  : end-start,
          text    : range.text
        };
      }
    }
    return {start: 0, end: 0, length: 0};
  }

});

// Debugging in Internet Explorer. This allows you to use 
// `console.log(['message', var1, var2, ...])`. Just remove the `false` and
// add your console.logs. This will automatically stringify objects using
// `JSON.stringify', so you can read what's going out. Think of this as a
// *Diet Firebug Lite Zero with Lemon*.
if (false) {
  window.console = {};
  var _$ied;
  window.console.log = function(msg) {
    if (_.isArray(msg)) {
      var message = msg[0];
      var vars = _.map(msg.slice(1), function(arg) {
        return JSON.stringify(arg);
      }).join(' - ');
    }
    if(!_$ied){
      _$ied = $('<div><ol></ol></div>').css({
        'position': 'fixed',
        'bottom': 10,
        'left': 10,
        'zIndex': 20000,
        'width': $('body').width() - 80,
        'border': '1px solid #000',
        'padding': '10px',
        'backgroundColor': '#fff',
        'fontFamily': 'arial,helvetica,sans-serif',
        'fontSize': '11px'
      });
      $('body').append(_$ied);
    }
    var $message = $('<li>'+message+' - '+vars+'</li>').css({
      'borderBottom': '1px solid #999999'
    });
    _$ied.find('ol').append($message);
    _.delay(function() {
      $message.fadeOut(500);
    }, 5000);
  };

}

})();

(function() {

var $ = jQuery; // Handle namespaced jQuery

// Used to extract keywords and facets from the free text search.
var QUOTES_RE   = "('[^']+'|\"[^\"]+\")";
var FREETEXT_RE = "('[^']+'|\"[^\"]+\"|[^'\"\\s]\\S*)";
var CATEGORY_RE = FREETEXT_RE +                     ':\\s*';
VS.app.SearchParser = {

  // Matches `category: "free text"`, with and without quotes.
  ALL_FIELDS : new RegExp(CATEGORY_RE + FREETEXT_RE, 'g'),

  // Matches a single category without the text. Used to correctly extract facets.
  CATEGORY   : new RegExp(CATEGORY_RE),

  // Called to parse a query into a collection of `SearchFacet` models.
  parse : function(instance, query) {
    var searchFacets = this._extractAllFacets(instance, query);
    instance.searchQuery.reset(searchFacets);
    return searchFacets;
  },

  // Walks the query and extracts facets, categories, and free text.
  _extractAllFacets : function(instance, query) {
    var facets = [];
    var originalQuery = query;
    while (query) {
      var category, value;
      originalQuery = query;
      var field = this._extractNextField(query);
      if (!field) {
        category = instance.options.remainder;
        value    = this._extractSearchText(query);
        query    = VS.utils.inflector.trim(query.replace(value, ''));
      } else if (field.indexOf(':') != -1) {
        category = field.match(this.CATEGORY)[1].replace(/(^['"]|['"]$)/g, '');
        value    = field.replace(this.CATEGORY, '').replace(/(^['"]|['"]$)/g, '');
        query    = VS.utils.inflector.trim(query.replace(field, ''));
      } else if (field.indexOf(':') == -1) {
        category = instance.options.remainder;
        value    = field;
        query    = VS.utils.inflector.trim(query.replace(value, ''));
      }

      if (category && value) {
          var searchFacet = new VS.model.SearchFacet({
            category : category,
            value    : VS.utils.inflector.trim(value),
            app      : instance
          });
          facets.push(searchFacet);
      }
      if (originalQuery == query) break;
    }

    return facets;
  },

  // Extracts the first field found, capturing any free text that comes
  // before the category.
  _extractNextField : function(query) {
    var textRe = new RegExp('^\\s*(\\S+)\\s+(?=' + QUOTES_RE + FREETEXT_RE + ')');
    var textMatch = query.match(textRe);
    if (textMatch && textMatch.length >= 1) {
      return textMatch[1];
    } else {
      return this._extractFirstField(query);
    }
  },

  // If there is no free text before the facet, extract the category and value.
  _extractFirstField : function(query) {
    var fields = query.match(this.ALL_FIELDS);
    return fields && fields.length && fields[0];
  },

  // If the found match is not a category and facet, extract the trimmed free text.
  _extractSearchText : function(query) {
    query = query || '';
    var text = VS.utils.inflector.trim(query.replace(this.ALL_FIELDS, ''));
    return text;
  }

};

})();

(function() {

var $ = jQuery; // Handle namespaced jQuery

// The model that holds individual search facets and their categories.
// Held in a collection by `VS.app.searchQuery`.
VS.model.SearchFacet = Backbone.Model.extend({

  // Extract the category and value and serialize it in preparation for
  // turning the entire searchBox into a search query that can be sent
  // to the server for parsing and searching.
  serialize : function() {
    var category = this.quoteCategory(this.get('category'));
    var value    = VS.utils.inflector.trim(this.get('value'));
    var remainder = this.get("app").options.remainder;

    if (!value) return '';

    if (!_.contains(this.get("app").options.unquotable || [], category) && category != remainder) {
      value = this.quoteValue(value);
    }

    if (category != remainder) {
      category = category + ': ';
    } else {
      category = "";
    }
    return category + value;
  },
  
  // Wrap categories that have spaces or any kind of quote with opposite matching
  // quotes to preserve the complex category during serialization.
  quoteCategory : function(category) {
    var hasDoubleQuote = (/"/).test(category);
    var hasSingleQuote = (/'/).test(category);
    var hasSpace       = (/\s/).test(category);
    
    if (hasDoubleQuote && !hasSingleQuote) {
      return "'" + category + "'";
    } else if (hasSpace || (hasSingleQuote && !hasDoubleQuote)) {
      return '"' + category + '"';
    } else {
      return category;
    }
  },
  
  // Wrap values that have quotes in opposite matching quotes. If a value has
  // both single and double quotes, just use the double quotes.
  quoteValue : function(value) {
    var hasDoubleQuote = (/"/).test(value);
    var hasSingleQuote = (/'/).test(value);
    
    if (hasDoubleQuote && !hasSingleQuote) {
      return "'" + value + "'";
    } else {
      return '"' + value + '"';
    }
  },
  
  // If provided, use a custom label instead of the raw value.
  label : function() {
      return this.get('label') || this.get('value');
  }

});

})();
(function() {

var $ = jQuery; // Handle namespaced jQuery

// Collection which holds all of the individual facets (category: value).
// Used for finding and removing specific facets.
VS.model.SearchQuery = Backbone.Collection.extend({

  // Model holds the category and value of the facet.
  model : VS.model.SearchFacet,
  
  // Turns all of the facets into a single serialized string.
  serialize : function() {
    return this.map(function(facet){ return facet.serialize(); }).join(' ');
  },
  
  facets : function() {
    return this.map(function(facet) {
      var value = {};
      value[facet.get('category')] = facet.get('value');
      return value;
    });
  },

  // Find a facet by its category. Multiple facets with the same category
  // is fine, but only the first is returned.
  find : function(category) {
    var facet = this.detect(function(facet) {
      return facet.get('category').toLowerCase() == category.toLowerCase();
    });
    return facet && facet.get('value');
  },

  // Counts the number of times a specific category is in the search query.
  count : function(category) {
    return this.select(function(facet) {
      return facet.get('category').toLowerCase() == category.toLowerCase();
    }).length;
  },

  // Returns an array of extracted values from each facet in a category.
  values : function(category) {
    var facets = this.select(function(facet) {
      return facet.get('category').toLowerCase() == category.toLowerCase();
    });
    return _.map(facets, function(facet) { return facet.get('value'); });
  },

  // Checks all facets for matches of either a category or both category and value.
  has : function(category, value) {
    return this.any(function(facet) {
      var categoryMatched = facet.get('category').toLowerCase() == category.toLowerCase();
      if (!value) return categoryMatched;
      return categoryMatched && facet.get('value') == value;
    });
  },

  // Used to temporarily hide specific categories and serialize the search query.
  withoutCategory : function() {
    var categories = _.map(_.toArray(arguments), function(cat) { return cat.toLowerCase(); });
    return this.map(function(facet) {
      if (!_.include(categories, facet.get('category').toLowerCase())) { 
        return facet.serialize();
      };
    }).join(' ');
  }

});

})();
(function(){
window.JST = window.JST || {};

window.JST['search_box'] = _.template('<div class="VS-search <% if (readOnly) { %>VS-readonly<% } %>">\n  <div class="VS-search-box-wrapper VS-search-box">\n    <div class="VS-icon VS-icon-search"></div>\n    <div class="VS-placeholder"></div>\n    <div class="VS-search-inner"></div>\n    <div class="VS-icon VS-icon-cancel VS-cancel-search-box" title="clear search"></div>\n  </div>\n</div>');
window.JST['search_facet'] = _.template('<% if (model.has(\'category\')) { %>\n  <div class="category"><%= model.get(\'category\') %>:</div>\n<% } %>\n\n<div class="search_facet_input_container">\n  <textarea type="text" class="search_facet_input ui-menu VS-interface" value="" <% if (readOnly) { %>disabled="disabled"<% } %> />\n</div>\n\n<div class="search_facet_remove VS-icon VS-icon-cancel"></div>');
window.JST['search_input'] = _.template('<textarea type="text" class="ui-menu" <% if (readOnly) { %>disabled="disabled"<% } %> />');
})();